/**

   \file

   \brief This module contains NMC1000 I2C protocol bus APIs implementation.

   Copyright (c) 2016 Atmel Corporation. All rights reserved.

   \asf_license_start

   \page License

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are met:

   1. Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.

   2. Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.

   3. The name of Atmel may not be used to endorse or promote products derived
      from this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
   WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
   EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
   ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   POSSIBILITY OF SUCH DAMAGE.

   \asf_license_stop

*/

#include "common/include/nm_common.h"

#ifdef CONF_WINC_USE_I2C

#include "nmi2c.h"
#include "bus_wrapper/include/nm_bus_wrapper.h"


/*
  @fn   nm_i2c_read_reg_with_ret
  @brief  Read register with error code return
  @param [in] u32Addr
        Register address
  @param [out]  pu32RetVal
        Pointer to u32 variable used to return the read value
  @return M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
  @author M. Abdelmawla
  @date 11 July 2012
  @version  1.0
*/
sint8 nm_i2c_read_reg_with_ret(uint32 u32Addr, uint32* pu32RetVal)
{
  uint8 b[6];
  uint8 rsz;
  tstrNmI2cDefault strI2c;
  sint8 s8Ret = M2M_SUCCESS;

  if (u32Addr < 0xff)  /* clockless i2c */
  {
    b[0] = 0x09;
    b[1] = (uint8)(u32Addr);
    rsz = 1;
    strI2c.u16Sz = 2;
  }
  else
  {
    b[0] = 0x80;
    b[1] = (uint8)(u32Addr >> 24);
    b[2] = (uint8)(u32Addr >> 16);
    b[3] = (uint8)(u32Addr >> 8);
    b[4] = (uint8)(u32Addr);
    b[5] = 0x04;
    rsz = 4;
    strI2c.u16Sz = 6;
  }

  strI2c.pu8Buf = b;

  if (M2M_SUCCESS == nm_bus_ioctl(NM_BUS_IOCTL_W, &strI2c))
  {
    strI2c.u16Sz = rsz;

    if (M2M_SUCCESS != nm_bus_ioctl(NM_BUS_IOCTL_R, &strI2c))
    {
      //M2M_ERR("read error\n");
      s8Ret = M2M_ERR_BUS_FAIL;
    }
  }
  else
  {
    M2M_ERR("failed to send cfg bytes\n");
    s8Ret = M2M_ERR_BUS_FAIL;
  }

  if (rsz == 1)
  {
    *pu32RetVal = b[0];
  }
  else
  {
    *pu32RetVal = b[0] | ((uint32)b[1] << 8) | ((uint32)b[2] << 16) | ((uint32)b[3] << 24);
  }

  return s8Ret;
}

/*
  @fn   nm_i2c_read_reg
  @brief  Read register
  @param [in] u32Addr
        Register address
  @return Register value
  @author M. Abdelmawla
  @date 11 July 2012
  @version  1.0
*/
uint32 nm_i2c_read_reg(uint32 u32Addr)
{
  uint32 val;
  nm_i2c_read_reg_with_ret(u32Addr, &val);
  return val;
}

/*
  @fn   nm_i2c_write_reg
  @brief  write register
  @param [in] u32Addr
        Register address
  @param [in] u32Val
        Value to be written to the register
  @return M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
  @author M. Abdelmawla
  @date 11 July 2012
  @version  1.0
*/
sint8 nm_i2c_write_reg(uint32 u32Addr, uint32 u32Val)
{
  tstrNmI2cDefault strI2c;
  uint8 b[16];
  sint8 s8Ret = M2M_SUCCESS;

  if (u32Addr < 0xff)  /* clockless i2c */
  {
    b[0] = 0x19;
    b[1] = (uint8)(u32Addr);
    b[2] = (uint8)(u32Val);
    strI2c.u16Sz = 3;
  }
  else
  {
    b[0] = 0x90;
    b[1] = (uint8)(u32Addr >> 24);
    b[2] = (uint8)(u32Addr >> 16);
    b[3] = (uint8)(u32Addr >> 8);
    b[4] = (uint8)u32Addr;
    b[5] = 0x04;
    b[6] = (uint8)u32Val;
    b[7] = (uint8)(u32Val >> 8);
    b[8] = (uint8)(u32Val >> 16);
    b[9] = (uint8)(u32Val >> 24);
    strI2c.u16Sz = 10;
  }

  strI2c.pu8Buf = b;

  if (M2M_SUCCESS != nm_bus_ioctl(NM_BUS_IOCTL_W, &strI2c))
  {
    M2M_ERR("write error\n");
    s8Ret = M2M_ERR_BUS_FAIL;
  }

  return s8Ret;
}

/*
  @fn   nm_i2c_read_block
  @brief  Read block of data
  @param [in] u32Addr
        Start address
  @param [out]  puBuf
        Pointer to a buffer used to return the read data
  @param [in] u16Sz
        Number of bytes to read. The buffer size must be >= u16Sz
  @return M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
  @author M. Abdelmawla
  @date 11 July 2012
  @version  1.0
*/
sint8 nm_i2c_read_block(uint32 u32Addr, uint8 *pu8Buf, uint16 u16Sz)
{
  tstrNmI2cDefault strI2c;
  uint8 au8Buf[7];
  sint8 s8Ret = M2M_SUCCESS;

  au8Buf[0] = 0x02;
  au8Buf[1] = (uint8)(u32Addr >> 24);
  au8Buf[2] = (uint8)(u32Addr >> 16);
  au8Buf[3] = (uint8)(u32Addr >> 8);
  au8Buf[4] = (uint8)(u32Addr >> 0);
  au8Buf[5] = (uint8)(u16Sz >> 8);
  au8Buf[6] = (uint8)(u16Sz);

  strI2c.pu8Buf = au8Buf;
  strI2c.u16Sz = sizeof(au8Buf);

  if (M2M_SUCCESS != nm_bus_ioctl(NM_BUS_IOCTL_W, &strI2c))
  {
    M2M_ERR("write error\n");
    s8Ret = M2M_ERR_BUS_FAIL;
  }
  else
  {
    strI2c.pu8Buf = pu8Buf;
    strI2c.u16Sz = u16Sz;

    if (M2M_SUCCESS != nm_bus_ioctl(NM_BUS_IOCTL_R, &strI2c))
    {
      M2M_ERR("read error\n");
      s8Ret = M2M_ERR_BUS_FAIL;
    }
  }

  return s8Ret;
}

/*
  @fn   nm_i2c_write_block
  @brief  Write block of data
  @param [in] u32Addr
        Start address
  @param [in] puBuf
        Pointer to the buffer holding the data to be written
  @param [in] u16Sz
        Number of bytes to write. The buffer size must be >= u16Sz
  @return M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
  @author M. Abdelmawla
  @date 11 July 2012
  @version  1.0
*/
sint8 nm_i2c_write_block(uint32 u32Addr, uint8 *pu8Buf, uint16 u16Sz)
{
  uint8 au8Buf[7];
  tstrNmI2cSpecial strI2c;
  sint8 s8Ret = M2M_SUCCESS;

  au8Buf[0] = 0x12;
  au8Buf[1] = (uint8)(u32Addr >> 24);
  au8Buf[2] = (uint8)(u32Addr >> 16);
  au8Buf[3] = (uint8)(u32Addr >> 8);
  au8Buf[4] = (uint8)(u32Addr);
  au8Buf[5] = (uint8)(u16Sz >> 8);
  au8Buf[6] = (uint8)(u16Sz);

  strI2c.pu8Buf1 = au8Buf;
  strI2c.pu8Buf2 = pu8Buf;
  strI2c.u16Sz1 = sizeof(au8Buf);
  strI2c.u16Sz2 = u16Sz;

  if (M2M_SUCCESS != nm_bus_ioctl(NM_BUS_IOCTL_W_SPECIAL, &strI2c))
  {
    M2M_ERR("write error\n");
    s8Ret = M2M_ERR_BUS_FAIL;
  }

  return s8Ret;
}

#endif
/* EOF */